1.     Vijayasankar R, Ravikumar K, Ravichandran P (2012). Plant Resources of Tiruvannamalai District, Tamil Nadu, India. Bishen Singh Mahendra Pal Singh, Dehra Dun. pp 852. [ISBN: 9788121107365]

2.    Ravikumar K, Vijayasankar R, Murugan R, Goraya GS, Begam SN (2009). Photo-guide to selected medicinal plants of Karnataka. FRLHT, Bangalore. pp 111. [ISBN: 9788190896535]

3.   Vijayasankar R (2001). Eliya Muraiyil Mooligai Vaidhiyam (booklet in Tamil language). Shanthimalai Research and Development Trust, Tiruvannamalai.

4.    Ravikumar K, Ved DK, Vijayasankar R, Udayan PS (2000). Illustrated Field Guide to 100 Red Listed Medicinal Plants    of Conservation Concern in southern India. FRLHT, Bangalore. pp 467.

5.     Ved DK, Ravikumar K, Goraya GS, Vijayasankar R, Begum SN, Kavitha M, Murugan R. Compendium of Traded Indian Medicinal Plants. FRLHT, Bangalore. [in press].

 Book chapter

1.    Vijayasankar R, Ravikumar K, Goraya GS. 2008. Floristic wealth of Javvadhu Hills, Eastern Ghats, with special emphasis on threatened plants. In: Rawat G S. (Ed.). Special habitats and threatened plants of India. ENVIS Bulletin: Wildlife and Protected Areas, Wildlife Institute of India, Dehradun, 11(1): 187-19

34. Galal AM, Raman V, Khan IA. Sida cordifolia, a traditional herb in a modern perspective – a review. Current Traditional Medicine DOI: 10.2174/2215083801666141226215639 [Abstract].

33. Vijayasankar R, Harry T. Horner, Ikhlas A. Khan. 2014. New and unusual forms of calcium oxalate raphide crystals in Plant Kingdom. Journal of Plant Research 127:721–730; DOI 10.1007/s10265-014-0654-y [Abstract]

32.  Ravikumar K, Babu NMG, Balachandran N, Vijayasankar R. 2014. Acanthospermum consobrinum (Asteraceae) - A New Record for India. Rheedea 24(1): 50-51. [PDF]

31. Vijayasankar R, Ahmed M. Galal, Bharathi Avula, Satyanarayanaraju Sagi, Troy J. Smillie, Ikhlas A. Khan. 2014. Application of anatomy and HPTLC in characterizing species of Dioscorea (Dioscoreaceae). Journal of Natural Medicines 68:686-698. DOI:10.1007/s11418-014-0849-5 [PDF]

30. Ravikumar K, Noorunnisa Begum S, Vijayasankar R. 2014. “Notes on the distribution of Semecarpus subpanduriformis [Anacardiaceae] in India”. In: Panda S, Ghosh C. (eds.). Diversity and Conservation of Plants and Traditional Knowledge. Bishen Singh Mahendra Pal Singh, Dehra Dun. pp 305-308.

29. Anna P Kowalczuk, Vijayasankar R, Ahmed M Galal, Ikhlas A Khan, Daniel J Siebert, Jordan K Zjawiony. “Vegetative anatomy and micromorphology of Salvia divinorum (Lamiaceae) from Mexico, combined with chromatographic analysis of salvinorin A”. Journal of Natural Medicines 68:63–73. 2014. DOI 10.1007/s11418-013-0769-9 [Abstract]

28. Wang, Mei, Bharathi Avula, Yan-Hong Wang, Jianping Zhao, Cristina Avonto, Jon F. Parcher, Vijayasankar R, Jerry A. Zweigenbaum, Philip L. Wylie, and Ikhlas A. Khan. "An integrated approach utilizing chemometrics and GC/MS for classification of chamomile flowers, essential oils and commercial products." Food Chemistry 152: 391-8. 2014. [Abstract]

27. Tabanca, Nurhayat, Cristina Avonto, Mei Wang, Jon F. Parcher, Abbas Ali, Betul Demirci, Vijayasankar R and Ikhlas A. Khan. "Comparative investigation of Umbellularia californica and Laurus nobilis Leaf Essential oils and Identification of Constituents Active against Aedes aegypti." Journal of Agricultural and Food Chemistry 61(50): 12283−12291. 2013. DOI: 10.1021/jf4052682 [Abstract]

26. Raman V, Avula B, Galal AM, Wang YH, Khan IA. Microscopic and UPLC-UV-MS analyses of authentic and commercial yohimbe (Pausinystalia johimbe) bark samples. Journal of Natural Medicines 01/2013; 67(1):42-50. DOI: 10.1007/s11418-012-0642-2. [Abstract]

25. Singh A., S. Majumdar, W. Deng, N.N. Mohammed, A.G. Chittiboyina, V. Raman, S. Shah, M.A. Repka. Development and characterization of taste masked Efavirenz pellets utilizing hot melt extrusion.  J. Drug Del. Sci. Tech., 23(2): 157-163 2013. [Abstract].

24. Hemant Lata, Suman Chandra, Yan-Hong Wang, Vijayasankar R, Ikhlas A Khan. TDZ-Induced High Frequency Plant Regeneration through Direct Shoot Organogenesis in Stevia rebaudiana Bertoni: An Important Medicinal Plant and a Natural Sweetener. American Journal of Plant Sciences 01/2013; 4:117-128. DOI: 10.4236/ajps.2013.41016. [PDF].

23.  Ahmed M Galal, Vijayasankar R, Bharathi Avula, Yan-Hong Wang, Chidananda Swamy Rumalla, Aruna D. Weerasooriya, Ikhlas A Khan. Comparative study of three Plumbago L. species (Plumbaginaceae) by microscopy, UPLC-UV and HPTLC. Journal of Natural Medicines 07/2013; 67(3): 554-561. DOI: 10.1007/s11418-012-0717-0. [Abstract].

22. Vijayasankar R, Ahmed M. Galal, Ikhlas A. Khan. An Investigation of the Vegetative Anatomy of Piper sarmentosum, and a Comparison with the Anatomy of Piper betle (Piperaceae). American Journal of Plant Sciences 3(8): 1135-44. 2012. [PDF].

21. Vijayasankar R, Kottaimuthu R, Ravikumar K. Additions to the flora of Sirumalai Hills, Eastern Ghats, Tamil Nadu. Journal of Threatened Taxa 1(7): 379-381. 2009. [PDF]

20. Ravikumar K, Vijayasankar R. Antiaris Toxicaria (Moraceae) – a new distribution record to the Eastern Ghats. Journal of Threatened Taxa 1(1): 58-59. 2009. [PDF]

19. Vijayasankar R, Ravikumar K, Ganesh Babu NM, Ved DK. Botany of Anapady MPCA, Palghat district, Kerala with special emphasis on species of conservation concern. Bull. Bot. Surv. India 49: 165-172. 2007.

18. Ganesh Babu NM, Ravikumar K, Vijayasankar R, Ved DK, Ganesan R. On the distribution and ethnobotany of Peucedanum dhana var. dalzellii (Apiaceae), a little known endemic from southern India. Ind. J. Forestry 30(2): 167-170. 2007.

17. Vijayasankar R, Ravikumar K, Ganesh Babu NM. A new species of Eriocaulon L. (Eriocaulaceae) from Anamalai Hills of Kerala, India. Rheedea 16(1): 59-61. 2006.

16. Ganesh Babu NM, Ravikumar K, Vijayasankar R. Notes on some interesting and noteworthy plants from southern India. J. Econ. Tax. Bot. 30(2): 390-393. 2006.

15. Ved, DK, Kinhal GA, Ravikumar K, Vijayasankar R and Haridasan K. Conservation Assessment and Management Prioritisation (CAMP) for wild medicinal plants of North-East India. Medicinal Plant Conservation 11 (2005): 40-44.

14.  Ravikumar K, Ved DK, Vijayasankar R, Ganesh Babu NM. Medicinal Plant Diversity in India: Current Status and in situ Conservation in southern India – A case study. In: R. Baskar & al. (eds.). Abstracts of National Seminar on “Medicinal Plants Research-An Industry Oriented Perspective” organized by Dept. of Bio-chemistry, Dr. G.R. Damodaran College of Science, Coimbatore. pp. 30-46. June 21-22, 2005.

13. Vijayasankar R, Ravikumar K, Ganesh Babu NM. On the collection of a peninsular endemic, Barleria stocksii (Acanthaceae), after a century. Zoos’ Print Journal 20(3): 1820. March 2005. [PDF, Supplement]

12. Vijayasankar R, Ravikumar K, Suma TS, Ganesh Babu NM, R. Ganesan. Distribution note on Justicia nilgherrensis (Acanthaceae), a southern Indian endemic species. My Forest 41(1): 49-53. March

11. Ravikumar K, Begum SN, Vijayasankar R, Ved DK. Profile of medicinal plants diversity in Kerala MPCAs. In:   Medicinal Plants of Kerala: Conservation & Beneficiation – Compendium on the Focal Theme of 17th Kerala Science Congress. pp. 23-28. January 2005.

10. Begum SN, Ravikumar K, Vijayasankar R, Ved DK. Profile of medicinal plants diversity in Tamil Nadu MPCAs. In: Abstracts of XIV Annual Conference of IAAT and National Seminar on New Frontiers in Plant Taxonomy and Biodiversity Conservation. TBGRI, Thiruvananthapuram. p. 97. December 2004.

9. Ravikumar K, Lakshmanan V, Vijayasankar R. Notes on the extended distribution of three Indian endemics in Tamil Nadu. Rheedea 14: 69-70. 2004.

8. Ravikumar K, Vijayasankar R, Ved DK, Bhat KG. Is Madhuca insignis (Radlk.) H.J. Lam (Sapotaceae) really extinct? Phytotaxonomy 4: 119-123. 2004.

7. Vijayasankar R, Ravikumar K, Ravichandran P. Tinospora sinensis (Lour.) Merr. (Menispermaceae) - A hitherto unreported Red Listed medicinal plant from Tamil Nadu state. Indian For. 130(7): 731-734. July 2004.

6. Vijayasankar R, Ravikumar K. First report of Barleria lupulina Lindl. (Acanthaceae) from southern India. Zoos’ Print Journal 19(5): 1484. May 2004.[PDF, Supplement]

5. Vijayasankar R, Ravikumar K, Ravichandran P. Dipteracanthus beddomei (C.B. Clarke) Santapau (Acanthaceae) – A new report to southern India. Zoos’ Print Journal 19(4): 1442. April 2004. [PDF, Supplement]

4. Ravikumar K, Vijayasankar R, Ravishankar T. Rediscovery of Memecylon sisparense Gamble (Melastomataceae) 110 years after Type collection. In: Janarthanam, M.K., D. Narasimhan (eds.). Plant Diversity, Human Welfare and Conservation. Dept. of Botany, Goa University, Goa. pp. 151-156. 2003.

3. Vijayasankar R, Ravikumar K, Ravichandran P. Endemic species, Brachystelma brevitubulatum (Bedd.) Gamble (Asclepiadaceae), relocated after a century. Phytotaxonomy 3: 130-133. 2003.

2. Ravikumar K, Vijayasankar R. Ethnobotany of Malayali Tribes in Melpattu village, Javvadhu Hills of Eastern Ghats, Tiruvannamalai district, Tamil Nadu. J. Econ. Taxon. Bot. 27(3): 715-726. 2003.

1. Ravikumar K, Vijayasankar R, Prabhakaran V. Utleria salicifolia Bedd. ex Hook.f. (Periplocaceae) A Monotypic, Endemic and Critically Endangered, Red Listed Medicinal Plant relocated from its type locality. My Forest 37(2):495-498. June 2001.  [Abstract]

1.   Ved, D.K., G.A. Kinhal, K. Haridasan, K. Ravikumar, Utkarsh Ghate, R. Vijayasankar & J.H. Indresha (eds.). 2003. CAMP for the medicinal plants of Arunachal Pradesh, Assam, Meghalaya and Sikkim – Proceedings of the workshop. FRLHT, Bangalore. pp 157.

2.    Ved, D.K., G.A. Kinhal, K. Ravikumar, V. Prabhakaran, Utkarsh Ghate, R. Vijayasankar & J.H. Indresha (eds.). 2003. CAMP for the medicinal plants of Jammu & Kashmir, Himachal Pradesh & Uttaranchal. FRLHT, Bangalore. pp 206.

3.    Ved, D.K., G.A. Kinhal, K. Ravikumar, Mohan Karnat, R. Vijayasankar & J.H. Indresha (eds.). 2003. CAMP for the medicinal plants of Chhattisgarh and Madhya Pradesh. FRLHT, Bangalore. pp 165.

4.    Ved, D.K., G.A. Kinhal, B.M.S. Rathore, K. Ravikumar, R. Vijayasankar & R. Venkateswaran (eds.). 2006. CAMP for medicinal plant species of Madhya Pradesh – Eco-regional assimilation for conservation action - workshop report. FRLHT, Bangalore. pp 134.

5.     Ved, D.K., G.A. Kinhal, K. Ravikumar, S.K. Jain, R. Vijayasankar & R.Sumathi. 2007. CAMP for the Medicinal Plants of Rajasthan – report. FRLHT, Bangalore.

6.    Ved, D.K., G.A. Kinhal, K. Ravikumar, P.C. Panda, R. Vijayasankar & R. Sumathi. 2007. CAMP for the Medicinal Plants of Orissa – report. FRLHT, Bangalore.

7.   Ved, D.K., G.A. Kinhal, K. Ravikumar, R.R.P. Singh, R. Vijayasankar & R.Sumathi. 2007. CAMP for the Medicinal Plants of West Bengal – report. FRLHT, Bangalore.

 

1.     Raman V, Khan IA. Calcium oxalate crystals in Dioscorea (Dioscoreaceae). American Society of Pharmacognosy 2014 Annual Meeting & 14th Annual Oxford International Conference on the Science of Botanicals, Oxford, Mississippi, USA, 2-6 August 2014. Planta Med 2014; 80 - PV2. DOI: 10.1055/s-0034-1382764 [Abstract]

 2.  Raman V, Sagi S, Galal AM, Avula B, Khan IA. Comparative morpho-anatomy and HPTLC studies of leaves of Agathosma betulina and Agathosma crenulata. American Society of Pharmacognosy 2014 Annual Meeting & 14th Annual Oxford International Conference on the Science of Botanicals, Oxford, Mississippi, USA, 2-6 August 2014. Planta Med 2014; 80 - PPL11. DOI: 10.1055/s-0034-1382647 [Abstract]

 3.  Tabanca N, Demirci B, Avonto C, Wang M, Ali A, Bernier UR, Raman V, Khan IA. Mosquito repellent activity of essential oils and extracts from Chamomile flowers. American Society of Pharmacognosy 2014 Annual Meeting & 14th Annual Oxford International Conference on the Science of Botanicals, Oxford, Mississippi, USA, 2-6 August 2014. Planta Med 2014; 80 - PD53. DOI: 10.1055/s-0034-1382474 [Abstract]

 4. J Zhao, E Bedir, M Wang, B Avula, YH Wang, S Sagi, V Raman, IA Khan. NMR-based metabolomics for chemotaxonomic characterization and authentification of Astragalus species. American Society of Pharmacognosy 2014 Annual Meeting & 14th Annual Oxford International Conference on the Science of Botanicals, Oxford, Mississippi, USA, 2-6 August 2014. Planta Med 2014; 80 - PPL16. DOI: 10.1055/s-0034-1382652 [Abstract]

 5.    Raman V, Galal AM, Weerasooriya A, Khan IA. Identification of Yams – A Comparative Study of the Tubers of Four Species of Dioscorea L. (Dioscoreaceae) by Microscopy and HPTLC. 12^th Annual Oxford International Conference on the Science of Botanicals (ICSB), Oxford, MS. April 15^th-18^th, 2013. Planta Med 2013; 79 - P8. DOI: 10.1055/s-0033-1336450. [Abstract]

 6.   M Wang, B Avula, YH Wang, J Zhao, C Avonto, V Raman, J Parcher, J Zweigenbaum, P Wylie, IA Khan. GC/MS Coupled with Advanced Data Mining and Chemometric Tools for Differentiation and Classification of Chamomile Plants, Essential Oils and Commercial Products. Planta Med 2013; 79 - PH11. DOI: 10.1055/s-0033-1348601. [Abstract]

 7.  Wang M, Avula B, Wang Y-H, Zhao J, Avonto C, Raman V, Parcher JF, Khan IA, J Zweigenbaum. Analytical  Investigation of German, Roman and Chinese Chamomile Plant, Oil and Commercial Samples. 12^th Annual Oxford International Conference on the Science of Botanicals (ICSB), Oxford, MS, April 15^th-18^th, 2013. Planta Med 2013; 79 - P122. DOI: 10.1055/s-0033-1336564. [Abstract]

 8.    Rehman JU, Ali A, Tabanca N, Raman V, Demirci B, Baser KHC, Khan IA. Biting Deterrent and Larvicidal Activity of Essential oils of Magnolia grandiflora against Aedes aegypti. 12^th Annual Oxford International Conference on the Science of Botanicals (ICSB), Oxford, MS. April 15^th-18^th, 2013. Planta Med 2013; 79 - P20. DOI: 10.1055/s-0033-1336462. [Abstract]

 9.  Raman, V; Avula, B; Galal, A; Wang, YH; Khan, IA. Identification of Yohimbe Bark (Pausinystalia johimbe) using Microscopy and UPLC-MS Techniques. 11^th Annual Oxford International Conference on the Science of Botanicals. Oxford, MS. April 16^th-18^th, 2012. Planta Med 2012; 78 - P_21. DOI: 10.1055/s-0032-1307529. [Abstract]

 10. Raman, V; Galal, A; Weerasooriya, A; Khan, IA. Comparative Anatomy of Four Species of Piper (Piperaceae). 11^th Annual Oxford International Conference on the Science of Botanicals. Oxford, MS. April 16^th-18^th, 2012. Planta Med 2012; 78 - P_22. DOI: 10.1055/s-0032-1307530. [Abstract]

 11. Chandra S, Lata H, Raman V, ElSohly MA, Khan IA. Acclimatization of Micropropagated Stevia rebaudiana Bertoni to ex-vitro Conditions: Comparative Ecophysiology and Leaf Anatomy. 11^th Annual Oxford International Conference on the Science of Botanicals. Oxford, Mississippi. April 16^th-18^th, 2012. Planta Med 2012; 78 - P_3. DOI: 10.1055/s-0032-1307511. [Abstract]

 12. Kowalczuk, AP; Raman, V; Galal, A; Khan, IA; Siebert, D; Zjawiony, J. Anatomical Features of Salvia divinorum Epling and Játiva-M as Supporting Information in Marketed Product Identification. 11^th Annual Oxford International Conference on the Science of Botanicals. Oxford, Mississippi. April 16^th-18^th, 2012. Planta Med 2012; 78 - P_20. DOI: 10.1055/s-0032-1307528. [Abstract]

 13. Galal, A; Rumalla, CS; Vijayasankar Raman; Weerasooriya, A; Khan, IA. Comparative Study of Three Species of Plumbago using Microscopy and HPTLC Fingerprinting. 10^th Annual Oxford International Conference on the Science of Botanicals. Oxford, Mississippi, USA. 11^th-14^th April 2011. Planta Med 2011; 77 - P_68. DOI: 10.1055/s-0031-1273597. [Abstract]

 14.   Vijayasankar Raman; Khan, IA. Identification of Terminalia Species from India using Macro-morphological Features. 10^th Annual Oxford International Conference on the Science of Botanicals. Oxford, Mississippi, USA. 11^th-14^th April 2011. Planta Med 2011; 77 - P_1. DOI: 10.1055/s-0031-1273530. [Abstract]

 

1.     Prabhakaran, V., K. Ravikumar and R. Vijayasankar. Rediscovery of the millennium - Utleria salicifolia. Amruth Vol.5 (2): 21-27. April-May 2001.

2.     Vijayasankar, R. and K. Ravikumar. Blue mist in bloom. Amruth Vol.5 (3): 26-27 & 32. June-July 2001.

3.     Ravikumar, K., R. Vijayasankar and I.K. Sambashiva Rao. The potential green medicine from northeast India.      Amruth Vol.5 (4): 5-7. August-September 2001.

4.    Prabhakaran, V., K. Ravikumar and R. Vijayasankar. Janakia arayalpathra - the quest. Amruth Vol. 5(5): October-November 2001.

5.   Prabhakaran, V., D.K. Ved, Darshan Shankar, K. Ravikumar, R. Vijayasankar and N.M. Ganesh Babu. Medplant Network News Vol.4 (3): 1, 3-4. June-August 2004.

6.      Ravikumar, K. & R. Vijayasankar. Threatened medicinal plants-Series: Aegle marmelos. Poorveegam 1(2): 9-10. 2002.

7.    Ravikumar, K. & R. Vijayasankar. Threatened medicinal plants-Series: Aristolochia tagala. Poorveegam 2(4): 7-8. 2004.

8.     Ravikumar, K. & R. Vijayasankar. Threatened medicinal plants-Series: Artocarpus hirsutus. Poorveegam 3(4): 10-11. 2005.

9.    Ravikumar, K. & R. Vijayasankar. Threatened medicinal plants-Series: Aphanamixis polystachya. Poorveegam 1(1): 15-16. 2005.

10.   Ravikumar, K. & R. Vijayasankar. Threatened medicinal plants-Series: Cycas circinalis. Poorveegam 1(2): 24-25. 2005.

11.  Ravikumar, K. & R. Vijayasankar. Threatened medicinal plants-Series: Coscinium fenestratum. Poorveegam 1(2): 21-22. 2005.